Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 35: Poster Session II (Polymeric biomolecular films; Nanostructures; Electronic structure; Spin-orbit interaction; Phase transitions; Surface chemical reactions; Heterogeneous catalysis; Particles and clusters; Surface magnetism; Electron and spin dynamics; Surface dynamics; Methods; Electronic structure theory; Functional molecules)
O 35.106: Poster
Dienstag, 27. März 2012, 18:15–21:45, Poster B
STM characterization of self-assembled organic compounds on metallic surfaces — •Oscar Diaz Arado1,3, Lars Jansen1, Hendrik Wagner2, Amido Studer2, and Harald Fuchs1 — 1Physikalisches Institut and Center for Nanotechnology, Muenster — 2Organisch-Chemisches Institut, Westfaelische Wilhelms-Universitaet, Muenster — 3Centro de Estudios Avanzados de Cuba, CEAC, La Habana, Cuba.
Chemical reactions on surfaces (2D reactions) through the self-assembly of organic compounds have been an uprising field of research in the last years, being a promising alternative to construct covalent-linked organized structures, something thought to be impossible up to now [1]. Therefore, we investigate the possibility to initiate a chemical reaction between two organic compounds, 2,5-Dihexylterephthalaldehyde and Octanehydrazide, on Au (111), a simple geometry to study their possible 2D reactions [2]. These compounds were initially studied with a scanning tunneling microscope (STM) under a liquid environment, where no self-assembly process was observed. Organic molecular beam epitaxy is a method suitable to perform a controlled layer-by-layer deposition of organic compounds in the ultra high vacuum (UHV) regime. We present our preliminary results of the combination of the OMBE deposition technique with a room temperature STM under UHV conditions. The successful deposition and self-assembled structure formation of each compound is presented here. [1] D. F. Perepichka, F. Rosei, Science 2009, 323, 216 [2] T. R. Linderoth et. al., Angew. Chem. 2007, 119, 9387